Since VA theory has only one fermion, the authors of [1]} could not use the large \(N\)  approximation to support their statements.
That is why they refer to [2]} as the only case in the literature where the NJL type model was discussed for a single fermion \(N=1\)  in a non-perturbative renormalization group flow.
And they argued that the ERG equations in the UV limit may continuously relate the unstable models they proposed in [1]} to the models with non-linearly realized supersymmetry [4]}, [5]}, [6]}.
